Before the launch, some more photos alleging to be of the Mercury have appeared online and they show what appears to be a fingerprint scanner integrated into the space bar.

The purported images look incredibly similar to renders we've already seen, adding some real weight to the rumour. The front-facing camera on the top right of the device has been made a bit smaller compared to the pictures we've seen before, but otherwise everything looks the same.

The BlackBerry Mercury is expected to come with a 4.5-inch full HD display which curves off at the edges, with a speaker grille placed along the top edge and sensors on the top left.

It's a mid-range smartphone, so don't expect top-of-the-range internals, instead the Mercury should come with a 2.02GHz quad-core Snapdragon 821 processor and 3GB of RAM.

Around the back there will be an 18-megapixel camera and the front-facing should come in at 8-megapixels. Like previous BlackBerry DTEK smartphones, the 50 and 60, the DTEK 70 will run on Android 7.0 Nougat.